Control and Protection Units

Used along with Battery Chargers to provide additional protections in Ring Main Units

Control Card and Interlock Card

Control Cards and Motor Interlock Cards are used along with Battery Chargers to provide additional protections in Ring Main Unit (RMU). They help in enhancing the reliability and performance of the distribution system.

Control and Interlock Cards

Features & Benefits

  • It monitors all the push buttons and limit switches. On the first received command it processes the same and ignores other commands, if any
  •  A fifty second time limit is provided to the motor to rotate and reach the selected isolator open/close position. In case motor stop signal is not received during these fifty seconds, then the motor stops automatically and the unit is ready for next command.
  • Motor current is monitored continuously. In case it defects an over current condition, for five seconds, the unit will then become ready for the next command.
  • Indication & Potential free contact available to indicate readiness of the system to accept commands(local / remote)

Various models are available in control cards and motor interlock cards to meet the specific requirements of the RMU manufacturer and the utility.